290464639 has 2 divisors, whose sum is σ = 290464640. Its totient is φ = 290464638.

The previous prime is 290464619. The next prime is 290464679. The reversal of 290464639 is 936464092.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 290464639 - 2⁵ = 290464607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 290464595 and 290464604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290464619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145232319 + 145232320.

It is an arithmetic number, because the mean of its divisors is an integer number (145232320).

Almost surely, 2^290464639 is an apocalyptic number.

290464639 is a deficient number, since it is larger than the sum of its proper divisors (1).

290464639 is an equidigital number, since it uses as much as digits as its factorization.

290464639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 290464639 is about 17043.0231766550. The cubic root of 290464639 is about 662.2639113206.

The spelling of 290464639 in words is "two hundred ninety million, four hundred sixty-four thousand, six hundred thirty-nine".